Corylus plant named ‘York’

ABSTRACT

A new and distinct cultivar of  Corylus  plant named ‘York’ characterized by globose plant habit and moderate vigor, green developing and fully expanded leaves during the spring and summer, resistance to eastern filbert blight caused by the fungus  Anisogramma anomala  (Peck) E. Müller, presence of random amplified polymorphic DNA markers 152-800 and AA12-850, expression of incompatibility alleles S 2  and S 21  in the styles, and DNA fingerprints at 10 of 23 microsatellite marker loci that differ from both parents OSU 479.027 and OSU 504.065, and from one parent at an additional 11 marker loci.

ACKNOWLEDGMENT OF GOVERNMENT SUPPORT

This invention was made with government support under SpecificCooperative Agreement No. 58-5358-4542 awarded by the United StatesDepartment of Agriculture. The government has certain rights in theinvention.

Botanical denomination: Corylus avellana.

Variety designation: ‘York’.

BACKGROUND

The present Invention relates to a new and distinct cultivar of Corylusplant (hazelnut, filbert), botanically known as Corylus avellana, andhereinafter referred to by the name ‘York’. Corylus avellana is in thefamily Betulaceae.

The new Corylus resulted from a controlled cross of female parent OSU479.027 (unpatented) and male parent OSU 504.065 (unpatented) made in1997 by Shawn A. Mehlenbacher and David C. Smith. Hybrid seeds from thecross were harvested in August 1997, stratified, and seedlings grown inthe greenhouse during the summer of 1998. From this cross, total of 183seedling trees were planted in the field in Corvallis, Oreg., USA inOctober, 1998. ‘York’ was discovered and selected by the Inventors as asingle plant within the progeny of the stated cross-pollination in acontrolled environment in Corvallis, Oreg.

‘York’ was originally assigned the designation OSU 878.048, whichindicates the row and tree location of the original seedling. OSU479.027 is from a cross of OSU 231.111 (unpatented)×OSU 226.122(unpatented). OSU 504.065 is from a cross of OSU 186.080 (unpatented)×VR17-15 (unpatented). The pedigree of ‘York’ includes ‘Barcelona’(unpatented) widely grown in Oregon, ‘Casina’ from Asturias, Spain(unpatented), ‘Tonda Gentile delle Langhe’ from Piemonte, northern Italy(unpatented), ‘Montebello’ from Sicily, Italy (unpatented), and ‘TombulGhiaghli’, a Turkish cultivar obtained from Greece (unpatented).

The new cultivar was asexually reproduced by rooted suckers annually foreight years (2003-2010) in Corvallis, Oreg. The new cultivar was alsoasexually propagated by whip grafting in Corvallis, Oreg. The uniquefeatures of this new Corylus are stable and reproduced true-to-type insuccessive generations of asexual reproduction.

SUMMARY

The following traits have been repeatedly observed and are determined tobe the unique characteristics of ‘York’. These characteristics incombination distinguish ‘York’ as a new and distinct cultivar:

-   -   1. Globose plant habit and moderate vigor.    -   2. Green developing and fully expanded leaves during the spring        and summer.    -   3. Resistance to eastern filbert blight caused by the fungus        Anisogramma anomala (Peck) E. Müller.    -   4. Presence of random amplified polymorphic DNA markers 152-800        and AA12-850 in DNA of ‘York’ amplified by the polymerase chain        reaction. These two markers are linked to a dominant allele for        resistance to eastern filbert blight from the cultivar Gasaway        (unpatented).    -   5. Expression of incompatibility alleles S₂ and S₂₁ in the        styles.    -   6. DNA fingerprints at 10 of 23 microsatellite marker loci        differ from both parents OSU 479.027 and OSU 504.065, and from        one parent at an additional 11 marker loci. The microsatellite        primers are shown in Table 1, and allele sizes are shown in        Table 2. DNA fingerprints of standard cultivars ‘Barcelona’,        ‘Tonda Gentile delle Langhe’ and ‘Extra Ghiaghli’, and        ‘Gasaway’, the source of eastern filbert blight resistance, are        also shown in attached Table 2.

In comparisons in two replicated trials conducted in Corvallis, Oreg.,plants of the new Corylus differed from plants of the Corylus avellanacultivar Barcelona (unpatented), and other cultivars and selections ofCorylus avellana known to the Inventors primarily in nut size, nutshape, kernel percentage (ratio of kernel weight to nut weight),frequency of blank nuts (nuts lacking kernels), time of pollen shed,time of nut maturity, length of the husk or involucre, and plant size.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying colored photographs illustrate the overall appearanceof the new cultivar, showing the colors as true as it is reasonablypossible to obtain in colored reproductions of this type. Foliage colorsin the photographs may differ slightly from the color values cited inthe detailed botanical description which accurately describe the colorsof the new Corylus.

FIG. 1 shows a tree of the new cultivar ‘York’ growing in a field inAugust, in Corvallis, Oreg.

FIG. 2 shows the tree of the new cultivar ‘York’ growing in a field inJanuary, in Corvallis, Oreg.

FIG. 3 shows typical nuts, raw kernels, and blanched kernels of ‘York’hazelnut compared to those of ‘Jefferson’ hazelnut.

FIG. 4 shows typical nuts, raw kernels, and blanched kernels of ‘York’hazelnut compared to those of ‘Lewis’ hazelnut.

FIG. 5 shows the typical nuts, raw kernels, and blanched kernels of‘York’ hazelnut compared to those of ‘Barcelona’ hazelnut and otherhazelnut cultivars.

DETAILED BOTANICAL DESCRIPTION

The cultivar York has not been observed under all possible environmentalconditions. The phenotype may vary somewhat with variations inenvironment such as temperature and light intensity, without, however,any variance in genotype. The aforementioned photographs and followingobservations and measurements describe plants grown in Corvallis, Oreg.under commercial practice outdoors in the field during the fall, winterand spring. Plants used for the photographs and description werepropagated by tie-off layerage and growing on their own roots, and aboutseven years old. In the following description, color references are madeto The Royal Horticultural Society Colour Chart, 1966 Edition, exceptwhere general terms of ordinary dictionary significance are used.

-   Botanical classification: Corylus avellana cultivar York.-   Parentage:    -   -   Female, or seed, parent.—Corylus avellana selection OSU            479.027 (unpatented).        -   Male, or pollen, parent.—Corylus avellana selection OSU            504.065 (unpatented).-   Propagation (type rooted suckers):    -   -   Time to initiate roots.—About 30 days at 20 degrees C.        -   Time to produce a rooted young plant.—About six months at 22            degrees C.        -   Root description.—Fine to thick; freely branching; creamy            white in color.-   Propagation (type whip grafting):    -   -   Time to budbreak on the scions.—About 14 days at 25° C.        -   Time to produce a grafted plant.—About six months at 25° C.-   Plant description:    -   -   General appearance.—Perennial shrub.        -   Size.—Plant height is about 5 meters; plant diameter or            spread is about 5 meters.        -   Form.—Spreading plant habit.        -   Growth and branching habit.—freely branching; about 15            lateral branches develop per plant. Pinching, i.e., removal            of the terminal apices, enhances branching with lateral            branches potentially forming at every node.        -   Vigor.—Moderate vigor growth habit.        -   Roots.—Fine to thick; freely branching; creamy white in            color.        -   Lenticels.—11 circular within 1 square centimeter (counted            on dormant scions).-   Lateral branch description:    -   -   Length.—About 38 cm.        -   Diameter.—About 6 mm.        -   Internode length.—About 3.2 cm.        -   Texture.—Smooth, glabrous.        -   Strength.—Strong.        -   Color.—Immature — 152B, mature — 152B.-   Foliage description:    -   -   Arrangement.—Alternate, simple        -   Length.—About 10.0 cm.        -   Width.—About 9.3 cm.        -   Shape.—Ablong to ovate.        -   Apex.—Obtuse to acute.        -   Base.—Cordate.        -   Margin.—Serrate.        -   Texture.—Upper and lower surfaces — slightly pubescent.        -   Venation pattern.—Pinnate.        -   Leaf bud shape.—Globular.        -   Time of leaf bud burst.—Midseason, 11 days after            ‘Barcelona’.        -   Color.—Developing foliage: upper surface 146B, lower            surfaces: 146C. Fully expanded foliage, upper surface:            Spring and summer, 146A; late summer and fall, 146A. Fully            expanded foliage, lower surface: Spring and summer, 146C;            late summer and fall, 146C. Venation, upper surface: Spring            and summer, 146A; late summer and fall, 146A. Venation,            lower surface: Spring and summer, 148D; late summer and            fall, 148D. Leaf bud, 177C.-   Petiole description:    -   -   Length.—About 2.7 cm.        -   Diameter.—About 1.8 mm.        -   Texture.—Upper and lower surfaces: pubescent.        -   Color.—Upper surface: Spring and summer, 139D; late summer            and fall, 139D. lower surface: Spring and summer, 139D; late            summer and fall, 139D.-   Flower description:    -   -   Male inflorescences.—Catkins, color prior to elongation            194C.        -   Female inflorescence.—Style color 047B.        -   Stigma coloration.—047B.        -   Time of female flowering.—Midseason, 14 days after            ‘Barcelona’.        -   Time of pollen shed.—Midseason, around the same time as            ‘Daviana’ (unpatented).-   Involcure description:    -   -   Involucre constriction.—Absent.        -   Involucre length.—25% longer than nuts.        -   Strength of serration of indentation.—Moderate.        -   Pubescence.—Little        -   Thickness of callus at base.—Moderate callus at base similar            to ‘Barcelona’.        -   Description of jointing of bracts.—Involucre slit to the            base on one side. Nuts fall free of the involucre at            maturity (95% fall free).-   Nut description:    -   -   Length.—About 18.0 mm        -   Width.—About 19.7 mm.        -   Depth.—About 17.0 mm.        -   Nut shape.—Round.        -   Nut shape index [(width+depth)/2*length].—1.02.        -   Nut compression index (width/depth).—1.16.        -   Nut shell color.—164A.        -   Nut weight.—About 2.73 grams to 2.85 grams.        -   Predominant number of fruits per cluster.—Average 2 nuts per            cluster.        -   Stripes on shell.—About 24, color slightly darker than 164A.        -   Fruit apex.—Slight (not prominent).        -   Size of the fruit pistil scar.—Very small (0.5 mm×1 mm).        -   Nut curvature of the basal scar.—Flat (plane).        -   Frequency of blank nuts.—9.7%.        -   Time of nut maturity.—About 3 days earlier that ‘Barcelona’.        -   Husk length.—About 25% longer than the nuts.        -   Kernel weight.—About 1.23 grams to 1.32 grams.        -   Kernel percentage (kernel weight/nut weight).—About 46%.            Kernel shape — globular.        -   Kernel cross section shape.—Circular.        -   Kernel base shape.—Flat.        -   Lateral grooves.—None.-   Disease/pest resistance: Plants of the new Corylus are highly    resistant to eastern filbert blight caused by the fungus Anisogramma    anomala (Peck) E. Müller. Plants of the new Corylus are highly    resistant to bud mites (Phytoptus avellanae Nal.), while plants of    ‘Tonda Gentile delle Langhe’ are highly susceptible, and plants of    ‘Barcelona’ are highly resistant.-   Temperature tolerance: Tolerates temperatures from −10 to 38° C. in    the field in Corvallis, Oreg.

TABLE 1 Primers and annealing temperatures for the 24microsatellite marker loci used to fingerprint ‘York’and other hazelnut cultivars. Repeat Locus motif Size T_(a) n He Ho A613(TC)₁₃(CA)₁₂ 149-177 60 14 0.85 0.85 A614 (TC)₁₇(CA)₁₀ 125-156 60 140.85 0.85 NNN(CA)₆ A616 (AC)₁₁ 136-162 60 13 0.85 0.85 A640 (CT)₁₅354-378 67 11 0.80 0.73 (CA)₁₃ B107 (CT)₁₄ 112-151 55 14 0.85 0.80 B617(GA)₁₅ 280-298 60 9 0.80 0.78 B619 (TC)₂₁ 146-180 60 14 0.88 0.88 B634(AG)₁₅ 218-238 60 9 0.76 0.76 B657 (AG)₁₅ 210-228 60 8 0.84 0.98 B671(AG)₆NN 221-249 60 13 0.86 0.88 (GA)₁₇ B709 (GA)₂₁ 219-233 60 8 0.740.76 B733 (TC)₁₅ 161-183 60 8 0.68 0.68 B741 (GT)₅(GA)₁₂ 176-194 60 100.77 0.78 B749 (TC)₁₂ 200-210 60 6 0.60 0.64 B751 (GA)₁₅ 141-153 60 70.80 0.80 B774 (AG)₁₅ 195-213 60 8 0.80 0.80 B776 (GA)₁₇ 134-148 60 70.71 0.60 B795 (TC)₈Ns(CT)₇ 296-332 60 12 0.76 0.74 Ns(CT)₁₀ Ns(TC)₅C115 (TAA)₅ 167-226 60 14 0.80 0.80 (GAA)₁₂ KG809 (AGG)₆ 333-345 55 50.66 0.64 KG811 (GA)₁₇ 240-278 58 12 0.83 0.82 KG827 (CT)₁₃AA 264-282 679 0.78 0.84 (CA)₇ KG830 (CT)₁₄ 279-311 67 9 0.79 0.78 GTATT (CA)₈ Soman-(AAT)₅ 54 3 0.60 0.98 G Locus PIC r  LG Primers 5′-3′ A613 0.85 0.00 11Ned-CACACGCCTT GTCACTCTTT (SEQ ID NO: 1) A614 0.84 0.00 6 Hex-TGGCAGAGCTTTGTCAGCTT (SEQ ID NO: 3) A616 0.83 0.00 8 Fam-CACTCATACC GCAAACTCCA(SEQ ID NO: 5) A640 0.7 0.04 10 F-TGCCTCTGCA GTTAGTCATC AAATGTAGG(SEQ ID NO: 7) B107 0.83 0.02 10 Ned-GTAGGTGCAC TTGATGTGCTTTAC (SEQ ID NO: 9) B617 0.78 0.01 8 Fam-TCCGTGTTGA GTATGGACGA(SEQ ID NO: 11) B619 0.7 0.00 3 Fam-AGTCGGCTCC CCTTTTCTC (SEQ ID NO: 13)B634 0.73 0.00 4 Hex-CCTGCATCCA GGACTCATTA 60 (SEQ ID NO: 15) B657 0.82−0.08 11 Ned-GAGAGTGCGT CTTCCTCTGG (SEQ ID NO: 17) B671 0.84 −0.01 9Hex-TTGCCAGTGC ATACTCTGAT G (SEQ ID NO: 19) B709 0.70 −0.01 5Ned-CCAAGCACGA ATGAACTCAA (SEQ ID NO: 21) B733 0.63 0.00 7.2Ned-CACCCTCTTCA CCACCTCAT (SEQ ID NO: 23) B741 0.74 0.00 5Fam-GTTCACAGGC TGTTGGGTTT (SEQ ID NO: 25) B749 0.51 −0.03 1Hex-GGCTGACAAC ACAGCAGAAA (SEQ ID NO: 27) B751 0.77 0.01 7.2Fam-AGCTGGTTCTT CGACATTCC (SEQ ID NO: 29) B774 0.77 0.01 5Ned-GTTTTGCGAG CTCATTGTCA (SEQ ID NO: 31) B776 0.67 0.07 6Fam-TGTATGTACA CACGGAGAGA GAGA (SEQ ID NO: 33) B795 0.74 0.01 NAFam-GACCCACAAA CAATAACCTA TCTC (SEQ ID NO: 35) C115 0.77 0.00 4Fam-ATTTTCCGCA GATAATACAGG (SEQ ID NO: 37) KG809 0.60 0.01 4Hex-AGGCATCAGT TCATCCAA (SEQ ID NO: 39) KG811 0.81 0.01 2 Ned-AAGGCGGCACTCGCTCAC (SEQ ID NO: 41) KG827 0.75 −0.04 9 Fam-AGAACTCCGA CTAATAATCCTAACCCTTGC (SEQ ID NO: 43) KG830 0.76 0.00 9 Ned-TGGAGGAAGT TTTGAATGGTAGTAGAGGA (SEQ ID NO: 45) Soman-G 0.51 −0.27 NA Hex-TGGCGTTGCAACATATTCTC (SEQ ID NO: 47) Locus Primers 5′-3′ Reference A613R-CCCCTTTCACAT Gurcan et al. GTTTGCTT 2010 (SEQ ID NO: 2) A614R-GCAGTGGAGGA Gurcan et al. TTGCTGACT 2010 (SEQ ID NO: 4) A616R-ATGGCTTTTGCT Gurcan et al. TCGTTTTG 2010 (SEQ ID NO: 6) A640Fam-CGCCATATAATT Gurcan et al. GGGATGCTTGTT 2010 G (SEQ ID NO: 8) B107R-AACACCATATTG Boccacci et al. AGTCTTTCAAAG 2005; GokirmakC (SEQ ID NO: 10) et al. 2009 B617 R TGTTTTTGGTGG Gurcan et al. AGCGATG2010 (SEQ ID NO: 12) B619 R-GCGATCTGACCT Gurcan et al. CATTTTTG 2010(SEQ ID NO: 14) B634 R-GTGCAGAGGTTG Gurcan et al. CACTCAAA 2010(SEQ ID NO: 16) B657 R-AGCCTCACCTCC Gurcan et al. AACGAAC 2010(SEQ ID NO: 18) B671 R-ACCAGCTCTGGG Gurcan et al. CTTAACAC 2010(SEQ ID NO: 20) B709 R-GCGGGTTCTCGT Gurcan et al. TGTACACT 2010(SEQ ID NO: 22) B733 R-CATCCCCTGTTG Gurcan et al. GAGTTTTC 2010(SEQ ID NO: 24) B741 R-CGTGTTGCTCAT Gurcan et al. GTGTTGTG 2010(SEQ ID NO: 26) B749 R-TCGGCTAGGGTT Gurcan et al. AGGGTTTT 2010(SEQ ID NO: 28 B751 R-AAACTCAAATA Gurcan et al. AAACCCCTGCTC 2010(SEQ ID NO: 30) B774 R-TGTGTGTGGTCT Gurcan et al. GTAGGCACT 2010(SEQ ID NO: 32) B776 R-TGAGGGGAAGA Gurcan et al. GGTTTGATG 2010(SEQ ID NO: 34) B795 R-TGGGCATCATCC Gurcan et al. AGGTCTA 2010(SEQ ID NO: 36) C115 GTTTCCAGATCT Bassil et al. GCCTCCATATAA 2005b, T (SEQ ID NO: Gokirmak et al.  38) 2009 KG809 F-GGAAGGTGAGA Gurcan andGAAATCAAGT Mehlenbacher (SEQ ID NO: 40) 2010 KG811 F-GAACAACTGAAGurcan and GACAGCAAAG Mehlenbacher (SEQ ID NO: 42) 2010 KG827GAGGGAGCAAQ Gurcan and TCAAAGTTGAGA Mehlenbacher AGAAA 2010(SEQ ID NO: 44) KG830 AAAGCAACTCAT Gurcan and AGCTGAAGTCCA MehlenbacherATCA 2010 (SEQ ID NO: 46) Soman-G R-GCCATCTTTAGA unpublishedAAGTTCGATACAG (SEQ ID NO: 48) Primer fluorescent tags are FAM, HEX, andNED. Ta: annealing temperature (° C.) N: number of alleles He: expectedheterozygosity Ho: observed heterozygosity PIC: polymorphism informationcontent r: estimated null allele frequency LG: linkage group

TABLE 2 Allele sizes in ‘York’, its parents, and four other hazelnutcultivars at 24 microsatellite loci. ‘Tonda Gentile Tag Locus ‘York’479.027 504.065 delle Langhe’ NED A613 157/177 177/177 157/159 151/157HEX A614 125/158 125/132 148/158 125/135 FAM A616 142/150 142/150150/150 148/150 FAM A640 362/374 354/374 354/362 354/368 NED B107122/134 134/146 122/134 134/152 FAM B617 286/290 286/290 286/286 286/296FAM B619 156/164 156/164 156/164 148/164 HEX B634 226/234 226/226232/234 226/226 NED B657 220/222 222/226 220/224 218/226 HEX B671241/247 227/247 241/241 237/241 NED B709 227/231 227/231 227/227 227/227NED B733 171/179 171/179 173/179 171/173 FAM B741 177/186 177/186177/184 177/184 HEX B749 208/208 206/208 206/208 206/208 FAM B751151/153 151/153 143/151 149/153 NED B774 203/209 209/211 203/207 203/211FAM B776 137/150 137/137 137/150 137/137 FAM B795 330/330 296/330330/330 312/330 FAM C115 197/197 194/197 194/197 173/173 HEX KG809336/345 336/339 339/345 336/339 NED KG811 254/254 254/254 254/264254/264 FAM KG827 266/270 270/282 266/266 266/268 NED KG830 295/295295/295 295/295 291/295 HEX SMNG 196/200 196/200 196/200 196/200 ‘ExtraTag Locus ‘Barcelona’ Ghiaghli’ ‘Gasaway’ NED A613 151/159 167/169159/161 HEX A614 125/131 125/150 143/158 FAM A616 142/150 150/158148/148 FAM A640 354/374 374/374 362/368 NED B107 112/134 116/116122/128 FAM B617 286/290 294/296 292/296 FAM B619 156/170 164/174170/174 HEX B634 226/226 226/226 220/232 NED B657 218/222 210/222224/228 HEX B671 223/227 227/247 235/247 NED B709 225/233 225/227227/227 NED B733 171/173 171/171 173/173 FAM B741 177/186 177/184186/188 HEX B749 208/208 208/208 206/208 FAM B751 143/153 143/147143/143 NED B774 203/207 195/203 203/209 FAM B776 135/137 135/137146/150 FAM B795 330/330 296/310 314/316 FAM C115 173/194 182/194215/218 HEX KG809 336/336 336/339 336/345 NED KG811 258/264 240/242254/258 FAM KG827 280/282 276/282 270/280 NED KG830 291/295 291/295291/305 HEX SMNG 196/200 196/200 196/196

REFERENCES:

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We claim:
 1. A new and distinct cultivar of Corylus plant named ‘York’,as illustrated and described.